Improvement in fly-frames



y 2 `Sheets--Sheet 1. M. FRED EAU.

. Fly-Frames.

N0 149 297, Patented April 7, 1874i.

ZYSheets--Sheet 2.

M. FREDEAU.

F|y-Frames.

Patented April 7,1874.

UNITED @STATES l.

Rfrrnivrv OFFICE.

MICHEL FREDEAU, OF NEW YORK, N. Y.

IMPROVEMENT IN FLY-FRAMES.

Specification forming part of Letters Patent No. 149,297, dated April 7, 1874; application filed February 14, 1874.

and then delivering, the printed sheets. y This system,it is obvious, must always, and no matter at what rate of speed the fly may be worked,

involve a loss of lifty per cent. of time and power-viz., the time and power required to effect the upward or return mot-ion of the ily. Moreover, when working fast, the current of air created by the rapid tanning motion of the ny is apt to Hutter the paper and scatter it about, involving sometimes a serious loss of time and material, particularly when the paper has already been printed on both sides.

The object of my invention is to produce a fly-motion which will obviate these various inconveniences, which will work without any loss of time or power, and which will be specially adapted to the use of presses running at a high rate of speed.

The following is a description of my invention: The drum A bears a set of springs, which may vary in size and number, according to the requirements of the case 5 it also answers the purpose of a pulley for the tapes V V, which serve to guide the paper. These tapes are not, however, indispensable, and may be done away with in certain cases, as hereafter spec'- fied. The springs B are made fast to the drum in such a way that their straight line is at a tangent with the outer circumference of the said drum, and are held by means of a small plate, which prevents any side motion. They may be connected at the other extremity, or left free, in whole or in part, according to the style of press used, or workto be executed. They are partially connected in the drawing, space being left for the passage of the guiding-tapes V V. The diameter of the drum may also be increased at will, so as to admit of two or more sets of springs. At one of the extre1ni ties of the drum A is a loose pulley, C, over which passes the tape-.line X. By its means the fly may be worked at any required rate of speed without changing the speed of the press itself. In this case the tapes V V are dispensed with, and a mere segment of a circle may be substituted for the drum A to fasten the springs on. This pulley vmay also be located wherever found most advantageous. At the other extremity of the drum A is another loose pulley, D, on which runs the guiding -tape Y. This pulley answers the same purpose as the pulley C, with this exception, that it may be of much smaller diameter; whereas, in the rst case, its radius must always be equal to that of the drum A, or of any segment, if one be used instead. Below the pulley I) is another pulley, E, over which runs the tape Z, which serves to guide the paper uniformly and prevent its falling when it leaves the pulleys Q It, which might happen when a fast-runnin g press is first started. This tape also keeps the paper from liuttering or flying about, which is essential when working at great speed. O11 each end, and inside the frame-work, two cams, F and F', are affixed to the axle of the drum A, for the purpose of raising up the tightener T, and to let it fall again when the springs B have been sufficiently wound around the drum A. The tightener T is thus made to compel the springs to wind around the drum or segment up to the proper point, and then, being released, to let them fall again, thus delivering the paper upon the receiving-board before commencing another revolution. The tightener is held at eachveud by the longer arm of the forked levers L and L. Theselevers are jointed upon the frame in S, and their shorter arm is provided with a roller, which is constantly in contact. with the cams F and F. A. guard, G, which may be of sheet-iron, wood, or any material th at may be deemed preferable, protects the springs B, and gives them time and space to straighten up after each revolution of the drum.

The working of the apparatus may now be readily understood. The paper, as it comes from the pulleys Q It, is held steady by the guiding-tapes V V,Y, and Z, and is then caught from behind by the springs B, which have been What I claim as new, and for which I solicit drawn up by the combined action of the cams, Letters Patent, is-

lever, and jrigh-tener. The springs, being then The combination of the drum A, spring B,

released from the action of the tightener, Whip tightener T, levers L L', and cams F F', subdown the paper upon the receiving-board, and stantially as described, and for the purpose immediately Wind around the drum again, Withabove set forth.

out creatinoq the sliffhtest current of air to disturb the p51) er. 2 MICHEL FREDEAU.

Having now fully described my invention, I Witnesses:

do not mean to confine myself exclusively to MORGAN J. OBRIEN,

the arrangements shown in the drawing; but J OIIN H. VIENHOLD, Jr. 

